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Electric Machinery Fundamentals (Solutions Manual) Part 3

Tham khảo tài liệu 'electric machinery fundamentals (solutions manual) part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 121 n P 570r min 2 fl1 120 I20 59.5 Hz The no-load frequency of generator 2 corresponds to a frequency of n P 1800 r min 4 - -_ -------_---- ----_ 120 120 60.00 Hz The full-load frequency of generator 2 corresponds to a frequency of n P 1785 r min 4 f . -ft _ -------_----------_ 120 120 59.50 Hz a The speed droop of generator 1 is given by n H SD1 nl fl 1 nfl 1AAQZ . 3630 r m 100 3570 r min in 3570 r min 100 1 68_ The speed droop of generator 2 is given by n H g D 2 -Aẻ 100 J_ 1785 0 m in 1785 r min 100 0 84_ b The power supplied by generator 1 is given by 1 Pf s _ f D and the power supplied by generator 1 is given by 2 f s _ syf D The power curve s slope for generator 1 is . W _ P 0.1 W----------------- 0.1 MW_ Hz s M 1 Ill _fl f f 0.5 Hz 59.5 Hz The power curve s slope for generator 1 is _ P 0.07 _5 MW uw u sP2----- --------- _ _ ----- ----- 0.150 MW Hz g .00 Hz 59.50 Hz 60 The no-load frequency of generator 1 is 60.5 Hz and the no-load frequency of generator 2 is 60 Hz. The total power that they must supply is 100 kW so the system frequency can be found from the equations LOAD 1 LOAD P 1 nlP_ PP s gf f 2 nlS f sP Pf _ 100 kW 0.1 MW Hz 60.5 Hz fs 0.15 MW Hz 60.0 Hz f 100 kW 6H0z50 kW 0.10 MW fs 9000 k W 0.15 MW Hz sf 0.25 MW Hz f 6050 kW 9000 k_W 100 kW f 14 950 kW T_ 598 II 0.25 MW Hz 59.8 H_ c The power supplied by generator 1 is .